Countertop oven



FIG. 1 is a front perspective view of a countertop oven showing our newdesign;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The portion shown in broken lines is for illustrative purposes only andforms no part of the claimed design.

We claim the ornamental design for a countertop oven, as shown anddescribed.